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Title:Ballistic Conductance in Oxidized Si Nanowires
Authors:G. Fagas, J.C. Greer, 2009
Abstract: The influence of local oxidation in silicon nanowires on hole transport, and hence the effect of varying the oxidation state of silicon atoms at the wire surface, is studied using density functional theory in conjunction with a Green s function scattering method. For silicon nanowires with growth direction along [110] and diameters of a few nanometers, it is found that the introduction of oxygen bridging and back bonds does not significantly degrade hole transport for voltages up to several hundred millivolts relative to the valence band edge. As a result, the mean free paths are comparable to or longer than the wire lengths envisioned for transistor and other nanoelectronics applications. Transport along [100]-oriented nanowires is less favorable, thus providing an advantage in terms of hole mobilities for [110] nanowire orientations, as preferentially produced in some growth methods.
ICHEC Project:Band Gap Modification in Semiconductor Nanowires
Publication:Nano Lett. 9, 5 (2009) pp 1856–1860
URL: http://pubs.acs.org/doi/abs/10.1021/nl8038426
Keywords: nanowires, conductance, ballistic devices, oxidation
Status: Published

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